Scarificator



April 28, 1942. w. a HNNELL 2,281,278

' SCARIFICATOR v Filed July 29, 1939 INVENTCR figlierjfimwu Patented Apr. 28, 1942 SCARIFICATOR Walter S. Finnell, Elkhart, Ind., assignor to Finncll System, Inc., a corporation of Indiana Application July 29, 1939, Serial No. 287,331

17 Claims.

This invention relates to scarificators and more particularly to a scarifying attachment for floor machines of the general type shown'in United States Patent to W. S. Finnell dated October 11, 1932, Number 1,881,431, entitled Floor machine in which an electric motor is employed to drive a rotary scrubbing brush, sander or the like.

In many instances such a brush will not remove deposits of printers ink, glue, paint, dried blood, chemicals, rust and other deposits and substances often found, particularly on the floors of industrial establishments, and it is necessary to remove such deposits by scraping them oiT the floor or by the use of some means of scarification. It is not practical to use disc sanders to remove such deposits, especially on uneven floors.

An object of the present invention is therefore, to provide an attachment that may be used in machines of the general type above referred to.

Another object is to provide -a scarifier in which the scarifying elements are easily replaceable and in which elements of varying size and resiliency may be used.

Still another object is to provide a scarifier which may be easily and quickly attached and detached from its driving motor without the use of tools.

A further object is to provide a scarifier adapted to be rotated in which the scarifying elements are positioned so as to cover a maximum amount of the floor surface at each rotation of the scarifier while permitting the introduction of a detergent or other cleaning or dissolving agent to the floor subjacent the scarifier.

Other objects and advantages will be apparent from the following specification and drawing which shows by way of illustration embodiments of the invention. It will be understood that changes can be made in the construction herein set forth without department from the appended claims.

In the drawing:

Figure 1 is a plan view of the upper side of the scarifier disc or plate with cover plate broken away in parts;

Figure 2 is a sectional view on the line 2-201 the plate, Figure 1, with the cover plate in place thereon;

Figure 3 is a fragmentary view of the scarifier Figures 1 and 2 illustrating the attachment bushing;

Figure 4 is a sectional view on the line i4 Figure 3; and

Figure -5 illustrates the method of attaching the scarifier, shown in the preceding figures to a power machine.

The numeral Ill denotes the scarifier disc or plate, which may be a malleable iron casting or the like provided with a plurality of upwardly projecting bosses ll having circular-ended slots, holes, or open sockets l2 therein, adapted to receive scarifying members to be presently described. These bosses are arranged in any suitable manner over the face of the disc l0 and may belocated in a'series of concentric rows as shown and each boss has a transverse slot [3 across its upper end adapted to position a cotter pin l4 or other holding means to secure the scarifying members therein.

Arranged in any suitable manner upon the disc H) are a plurality of upwardly projectingbosses or scarifier supports l5, each having a transverse slot or groove I6 thereacross as shown and at the sides of each support are the holes I1, IE to receive the legs of scarifying members.

An additional series of upwardly projecting lugs, bosses or scarifier supports l9 are arranged in any suitable manner upon the disc 10, each lug having a transverse slot or groove 20 thereacross as shown, and at the sides of each support are the holes 2 I, 22 to receive the legs of scarifying members.

The supports l5, [9 form peaks which aresubstantially rectangular in cross section and those indicated at l5 have their axesradially disposed, and those at 19 have their axes circumferentially disposed. By this arrangement the scarifying members 23 supported on these supports are caused toengage the floor as the disc is rotated with their points one ahead of the other as shown at l9, or side by side as shown at It.

The scarifying members 23 are U-shaped and may have straight legs slightly flared outwardly, or these legs may be crimped, as shown at 23a, to give them added flexibility; they resemble hairpins in general shape, and the material from which they are made may be .035" in diameter or square or of any other suitable crosssection.- They may be made of any kind of wire such as bronze, brass, steel or other metal, depending upon the work to be done and the detergent or other solution to be used therewith.

These members may be of such cross-section that a bunch of them may be used, as shown at 24, Figure 1, or only a single member such as shown at 25, Figure 2, may be used in holes l7, It or 2|, 22. As the number of members per bunch, or the number of members per support l5 or l9 may be varied within wide limits no attempt is made to enumerate them.

When a bunch 24 of the scarifiers are used in one of the holes or sockets [2 the cotter pin I4 is Placed in the slot I3 so that the scarifiers 23 straddle the pin and the ends of these members project downwardly through the hole l2 in disc l and project freely from the bottom thereof so that the free ends 26 thereof will contact the surface of the floor when the device is in use.

The ends of the cotter pins M are spread as shown at 21 and placed so that one of the bosses I9 is therebetween whereby the pin cannot turn. This holds the bunch 24 of scarifiers from turning in the holes l2. If desired, the eye-ends of the cotter pins (if long pins are used) can be further held by adjacent bosses la or the scarlfier thereon so that, if necessary, both ends of the cotter pin, wire or other member used to keep the scarifier members from twisting in their sockets, can be held at both ends.

It will be observed that the scarifiers 23 will be presented to the floor as the disc Ill revolves at different angles of attack; that is to say, some of the scarifiers will be advanced to the work with one of the points 26 ahead of the other, others will be advanced with both legs 2% abreast. By properly positioning the scarifiers 23 and the bosses H and supports l5 and [6, the under surface of the disc I!) will be provided with scarifying points that will, when said disc is rotated, completely and evenly scarify the entire surface below the disc without uneven scoring, the cutting of grooves and the like.

By making some of the scarifiers 23 of heavy material and some lighter, smooth, even results can be attained which in some instances it would be difficult to secure with a single size of scarifier member.

A suitable number of scarifier elements 23 having been placed in disc ID as just described, and the cotter pins l4 having been properly located, a cover plate 28 is placed over the upper ends of the scarifiers and said plate is secured to the disc by screws 28a or in any suitable manner. As this plate 28 lies directly over all of the U-bends 23c of the scarifier members 23 they are prevented from being forced upward or out of position, and are held securely thereby when in service.

By removing the plate 28 the members 23 are which is easily pulled out of place as soon as the plate 28 is removed. The cotter pins present no difficulty in removal, and the replacement of the members 23 may be made by unskilled workmen without danger of damage to the device and without possibility of the scarifiers being improperly spaced or left loosely mounted in the disc l0.

Obviously the upwardly projecting bosses such as [5 and i9 could be omitted, the disc ID merely having a plurality of pairs of holes such as IT, IS for the legs of the scarifier elements 23, but the arrangement shown with the bosses is preferable because it provides a three-point support for each scarifier, each leg of which is supported where it passes through the disc and in addition, the bend of the scarifier is supported the height of the boss above the disc. This arrangement assures the scarifier being securely heldand distributes the bending strain over a substantial portion thereof.

This also applies to the bosses II which in ef fect form tubes or sockets about the upper portion of the scarifier elements passing therethrough and support same against outward flexmg.

This is particularly advantageous when using a plurality of scarifiers in the same socket.

The disc I0 is provided at the center with a flange Illa and a center portion [0b in which is secured a socket member 29, a portion of which forms the side Walls of a slot 30 in the center of the disc, and extending across this slot is the resilient member 3| forming spring locking ears 3m, 3!!) which when pressed together, permit the entire disc assembly to be snapped onto the driving coupling 32 of a scrubbing machine or the like, the coupling being rotatably driven by shaft 33 driven by the motor (not shown) of the machine.

The opening 2% in plate 28 and the openings 34 in the top of the disc l0 permit cleaning material or water to be fed downwardly through the revolving disc to the scarifiers when the device is in operation.

What is claimed is:

1. A scarificator including a disc having a plurality of openings therethrough, said openings being grouped in pairs, upstanding members rigidly supported on said disc, each in definite relation to a pair of openings, scarifier elements having U-shaped apexes supported on the upper ends of said members, a removable member overlying all said elements and maintaining said apexes in rigid engagement with said members, andmeans on said disc for securing the same in driven relation to a driving shaft, said removable member having a central aperture therethrough clearing said driving shaft.

2. A scarificator including a disc having a plurality of pairs of spaced openings extending therethrough, upstanding bosses between said pairs of openings, scarifier elements having U- shaped apexes supported on the upstanding bosses and having leg portions extending through said openings, means including a removable annulus overlying all said elements for removably and individually securing said elements in rigid engagement with said bosses, and means on said disc for rotatably connecting the same to a driving shaft, said removable member having a central aperture therethrough clearing said driving shaft.

3. A scarificator including a disc having a plurality of pairs of spaced holes extending therethrough, bosses extending from one face of said disc and positioned in the spaces between said holes, scarifier elements having U-shaped apexes supported on said bosses and having leg portions extending freely through said holes and terminating in a working plane spaced apart from the opposite face of said disc, the interior walls of said holes being adapted to damp said legs at points between said apexes and said working plane, means for clamping said apexes to said bosses, and means for securing said disc to a driving shaft.

4. In a scarificator, a plate-like disc having a plurality of substantially rectangular upstanding scarifier supports, forming elongated peaks arising from the upper surface of said disc, some of said supports having their longitudinal planes radially disposed in relation to said disc and others having their longitudinal plane circumferentially disposed relative to said disc, said disc having apertures therethrough spaced apart from said supports adjacent thereto, scarificator elements mounted on said supports, and means for secur mg said elements thereto.

5. In a scarificator, a disc forming a support, a pair of spaced holes formed in said disc, a boss formed integral with said disc and projecting from one face thereof, said boss being positioned between said holes and having its longitudinal axis substantially bisectingthe space between said holes, a shallow notch formed inthe upper end of' said boss angular with respect to said longitudinal axis, a U-shaped scarifying element having the inner surface of its apex lying in and located" by said notch and having its legs extend ing through and damped by the walls of said holes, and a securing member rigidly held against the external peak of saidapex, said boss and saidsecuring member forming the sole supporting means of said element.

6. In a scarificator, a disc, means for rotating said disc, a plurality of pairs of holes extending through said disc, a plurality of scarifiers comprised of U-shaped members, supporting means on said disc positioned between the holes of said pairs and terminating in a plane spaced apart from the surface of said disc, said scarifiers being positioned with the axes of their apexes substantially tangent to said plane, and detachable means for clamping said apexes to said supports.

'7. A scarificator including a disc having therein a plurality of concentric rows of holes, said holes being arranged in pairs, upstanding supporting members positioned between the holes of each of said pairs and having shallow grooves extending across their outer ends, U-shaped scarifying elements each having their apexes lying in the shallow groove of a supporting member and having its legs extending through the pair of holes associated with its supporting member, clamping means tangentially engaging the peaks of all said apexes, said clamping means and said supporting members forming the sole support of said elements, and means for securing said disc to a drive shaft.

8. A scarificator comprising a disc having thereon a plurality of concentric rows of openings therethrough, means on one side of said disc adjacent each of said openings for supporting scarifying elements thereon, scarifying elements supported on said means and having portions extending through said openings, means individual to each scarifier element for positioning same on its supporting means whereby each of said elements is prevented from turning, means common to all said scarifying elements for clamping same to said disc, comprising a removable member having a central aperture therethrough to afford clearance for a driving shaft, and means on said disc for rotatably connecting same through a driving shaft extending through said aperture whereby driving force may be applied directly to said disc.

9. A scarificator comprising a plate having a plurality of individual supports extending upwardly from one face thereof, a plurality of openings through said disc adjacent said supports, said openings being arranged in pairs and the openings of each pair being separated from each other by one of said supports, scarifying members spanning the tops of said supports and having portions extending freely through said openings, 2. plate overlying all said supports and tangentially engaging said member, and means for applying a fixed pressure to said plate thereby firmly supporting said scarifying members in a plane spaced apart from the surface of said plate.

10. A scarificator comprising. a member having a plurality of projecting bosses forming socketsextending outwardly from a surface therefrom, each boss having an-aperture extending therethrough and through said member, each boss having a transverse slot extending acrossthe outer end thereof, a scaritying member having legs extending through said aperture and freely outwardly from a surface of said first member, and holding means engaging said scarifying member and lying within said transverse slot whereby said scarifying member is positioned in said first member. 1 i V 1 1-. A scan'ficator comprising a member having a plurality of projecting bosses forming sockets extending outwardly from a surface therefrom,

each boss having an aperture extending therethrough and through said member, each boss having a transverse slot extending across the outer end thereof, a scarifying member having legs extending through said aperture and freely outwardly from a surface of said first member, holding means engaging said scarifying member and lying within said transverse slot whereby said scarifying member is positioned in said first member, and means extending outwardly from saidfirst member and. engaging said holding means ber, means extending outwardly from said first member and engaging said holding means to secure same in position, and a plate secured to said first member overlying the scarifying means.

13. A scarificator comprising a plate-like disc having a plurality of radially spaced sockets thereon, each socket having a centrally located aperture extending through said disc and communicating with the base of said socket to form a continuation thereof, each of said sockets having a transverse groove across the outer rim thereof, scarifying members positioned in said sockets and having portions extending downwardly in the bore of same and outwardly through the associated apertures through said disc, cross members engaging said scarifying members and lying within said transverse grooves whereby said scarifying members are positioned in said sockets, and means connected to said disc and engaging said scarifying members to hold same in place therein.

14. A scarificator disc having a rim portion and center portion, means secured to said center portion whereby said disc may be attached to its driving device, said center portion being spaced apart from the balance of said disc by radial arms extending inwardly from the rim portion thereof, said rim portion containing a plurality of openings therethrough, a plurality of sacrifying members positioned in said openings, individual means for securing some of said scarifying members in place means common to all the scarifiermembers for clamping same in position on said disc, said means comprising a removable member having a central aperture therethrough to afford clearance for a driving shaft, and means on said disc for rotatably connecting same to a driving shaft extending through said central aperture whereby driving force may be applied directly to said disc.

15. In combination with a rotatable disc for scarificators, a tubular boss formed integral therewith and having its outer end terminating in a plane spaced apart from the surface of said disc, 2. pair of aligned notches formed in the outer end of said tubular boss, a plurality of U-shaped scarifiers, a supporting member positioned in said notches spanning said boss and engaging the interiors of the U-ends of said scarifiers, said scarifiers extending through the hole in said boss and terminating in a plane spaced apart from the opposite face of said disc, and a plate detachably secured to said disc and tangentially engaging the apex of said U- ends for rigidly securing said elements to said bosses, said plate constituting a cover for said disc.

16. In combination with a rotatable disc for scarificators, a tubular boss formed integral therewith and having its hollow extending through said disc, the outer end of said tubular boss terminating in a plane spaced apart from the surface of said plate and having aligned notches formed therein, a group of U-shaped wire scarifiers forming a bundle or tuft a transverse member spanning the end of said tubular boss and lying within said notches, said bundle or tuft of scarifiers being positioned within said hollow spanning said transverse member and extending through said hollow to a plane spaced apart from the opposite face of said disc, and means externally engaging the U-ends of said scarifiers for supporting them on said boss.

17. In a scarificator, a disc, supporting means for scarifier elements on said disc comprising a plurality of hollow bosses having depressions formed across their upper ends to accommodate a pin, scarifier elements within said hollow bosses extending through said disc, said elements being supported on said bosses by pins extending across said hollow bosses and lying in the depressions therein and extending through said scarifier elements whereby same are supported in said bosses, a removable plate and means to secure to said disc said plate and adapted to contact the upper ends of said bosses and jointly cooperating therewith to fixedly secure said scarifier elements on said disc.

WALTER S. FINNELL. 

